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Represents percentage of stock options that will vest in the future period.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Net number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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SHARE-BASED COMPENSATION - Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock options
Method and assumptions on valuation of stock options
Expected stock option life (years)	3 years	3 years	3 years
Expected volatility	37.80%	50.20%	38.70%
Risk-free interest rate	1.80%	0.40%	1.20%
Expected dividend yield	0.00%	0.00%	0.00%
Options
Beginning of the period (in shares)	8,900,000
Granted (in shares)	2,600,000
Exercised (in shares)	(100,000)
Expired or forfeited (in shares)	(600,000)
End of the period (in shares)	10,800,000	8,900,000
Vested and expected to vest at the end of the period (in shares)	10,300,000
Vested and exercisable at the end of the period (in shares)	6,900,000
Weighted- Average Exercise Price Per Share
Beginning of the period (in dollars per share)	$ 27.65
Granted (in dollars per share)	23.95
Exercised (in dollars per share)	19.57
Expired or forfeited (in dollars per share)	28.29
End of the period (in dollars per share)	26.83	$ 27.65
Vested and expected to vest at the end of the period (in dollars per share)	26.86
Vested and exercisable at the end of the period (in dollars per share)	$ 27.39
Weighted- Average Remaining Contractual Term (Years)
Outstanding at the end of the period	6 years
Vested and expected to vest at the end of the period	5 years 10 months 24 days
Vested and exercisable at the end of the period	4 years 6 months
Aggregate Intrinsic Value
Outstanding at the end of the period	$ 0
Vested and expected to vest at the end of the period	0
Vested and exercisable at the end of the period	$ 0
Additional disclosures
Weighted-average grant date fair value of stock options (in dollars per share)	$ 6.60	$ 10.92	$ 6.60
Intrinsic value of stock options exercised in the period	$ 1	$ 15	$ 2
Proceeds from exercise of stock options	3	$ 22	$ 5
Remaining unrecognized compensation expense related to non-vested awards	$ 14
Weighted-average remaining requisite service period over which unrecognized compensation cost is expected to be amortized	1 year 6 months
Stock options \| Bausch + Lomb
Method and assumptions on valuation of stock options
Expected stock option life (years)	3 years
Expected volatility	31.50%
Risk-free interest rate	3.10%
Expected dividend yield	0.00%
Options
Beginning of the period (in shares)	0
Granted (in shares)	6,400,000
Exercised (in shares)	0
Expired or forfeited (in shares)	(100,000)
End of the period (in shares)	6,300,000	0
Vested and expected to vest at the end of the period (in shares)	1,200,000
Vested and exercisable at the end of the period (in shares)	0
Weighted- Average Exercise Price Per Share
Beginning of the period (in dollars per share)	$ 0
Granted (in dollars per share)	18.00
Exercised (in dollars per share)	0
Expired or forfeited (in dollars per share)	18.00
End of the period (in dollars per share)	18.00	$ 0
Vested and expected to vest at the end of the period (in dollars per share)	18.00
Vested and exercisable at the end of the period (in dollars per share)	$ 0
Weighted- Average Remaining Contractual Term (Years)
Outstanding at the end of the period	9 years 4 months 24 days
Vested and expected to vest at the end of the period	4 years 6 months
Vested and exercisable at the end of the period	0 years
Aggregate Intrinsic Value
Outstanding at the end of the period	$ 0
Vested and expected to vest at the end of the period	0
Vested and exercisable at the end of the period	$ 0
Additional disclosures
Weighted-average grant date fair value of stock options (in dollars per share)	$ 3.84
Remaining unrecognized compensation expense related to non-vested awards	$ 4
Weighted-average remaining requisite service period over which unrecognized compensation cost is expected to be amortized	8 months 12 days
Vesting Period One
Share-based compensation
Vesting period	3 years
Vesting Period One \| Stock options
Share-based compensation
Percentage of stock options that will vest on each of the first, second, third and fourth anniversaries from the date of grant	33.00%
Vesting Period Two
Share-based compensation
Vesting period	4 years
Vesting Period Two \| Stock options
Share-based compensation
Percentage of stock options that will vest on each of the first, second, third and fourth anniversaries from the date of grant	25.00%